Ok I've created an excel document on my mac using mac excel software 2011. I did a formula and it works great there but when I send the file to my work excel which is microsoft excel 2007 I get an #N'A in the cell where data should be. Not sure why it's not working. Here is the formula

=SUMPRODUCT(SUM(INDIRECT("'"&SheetList&"'!"&CELL(" address",O8)))/MAX(1,SUMPRODUCT(COUNTIF(INDIRECT("'"&SheetList&"' !"&CELL("address",O8)),"0"))))


does it have to do with the INDIRECT portion of the formula? I also try to use the show calculations feature but I'm not sure how that works.

Thanks for the help!!!